Torque and speed responsive mechanism



' Dec.7,1948. 'J. NADER Em. 2,455,435

TORQUE AND SPEED RESPONSIVE MECHANISM Original Filed Sept. 2, 1943 FIG.3

FIG. 2.

INVENTORS JOSEPH NADER JOSEPH F. MAIL NDEF? Q. Q. M

AT TORNEY T Patented Dec. 7, 1948 I QRQIJEAND SPEED: RESPONSIVE.NIECHANISM JosephNader' and Josepl'rF. Mailandcr; Glen Ellyn, Ill..

Continuation of application Serial No.- 500,958, September 2, 1943. Thisapplication April 4, 1945, Serial No". 586,508

9- Claims. 1

This invention relates in general to torque and speed responsivemechanism and relates in parti'cular'to the use of suchmechanisnrinconjunct-ion with electrical generating machinery where it:desired" to maintain the voltage as constant as possible: by controllingthe speed thereof, and at the same timeto make the'ma'chinery possibleof supplying high currents as measured by the torque applied to" themachine.

It is=-. anobje'ct of the invention to provide an extremelysimple speedand torque responsive mechanism.

Another object'is to provide a torque and speed responsive mechanismwhich is responsive to the cutputtorque of a driven machineimsuch'amann'erthat th'e speed responsive portion thereof will not: be:entirely controlling when the torque demand increaseslbeyond' somepredetermined value;

Aaturther: object of the invention is toprovide a: torque and speedresponsive mechanism where the effect of" the torque applied toa drivenmemher: is toznegate or subtract'from the effect of the speedresponsive'portion of the mechanism.

Yet another object is to provide in a torque and speed responsivemechanism a simple and eifi'cient arrangement to increase the. forcetransmitted; by a. clutch when the torque applied to a driven shaftis'zincr-e'ased; at'the same-time providing for'th'e' control of speedof the driven shaft whereitheapp'lied torque is below a predeterminedamount.

Other ob jectsan'd'advantages of the: invention will be apparent during:the course'of'the' description hereinafter; It: isto be distinctlyunderstood; however, that the; inventi'cn: is not limited in terms ofthe. embodiment shown", which is for theipurp'ose of illustratingtheinvention only; nor otherwise than by the; spirit and scope of theclaims appended: hereto;

This application is 1 acontinuation of Nader, et all, application SerialNo. 500358; fi1edSept'em'- her 2, 1943, nowab'andoned.

Il'll the drawings:

Figure 1 is a: showing: partly in elevation and partly in section of theinvention. where it is shown: incorporated for usewith a prime moverand: a generator;

Figure'Z. is asection taken on. the lines 2-2- of Figure 1E; and

Figure 3' is a section taken' on: the lines 3-3 of Figure 1'.

Asshown'in'Eigure 1, a; prime mover'lt iscoupie-c.1111. any-convenientmanner-to a" driving shaft lag and: through: the medium of? the: torqueand speed responsive mechanism; indicatedv generally 2; by the ordinall4, power is transmitted'to a driven shaft [-6, which is connecteddirectly to a generator l8.

Means are-provided 'for efiecting a driving connection between the primemover l0 and the generator l8, and as-shown the end of driving shaft E2. isv provided with a driving drum 213, made of graphitedzbronzei orthe like, which is frictionally engaged by a pair of shoes 22 pivotallymounted on pins 24 to levers 26' pivoted" at 28. to a yoke 38 whichextends radially from a sleeve 32 rotatably mountedrupon the drivenshaft 16. The yoke 30 may be pressfitted on sleeve 32 or shrunk thereto,or secured 'iniany other convenient manner.

To efiect a driving connection between the sleeve 32 and the drivenshaft it a cam member 34 having, avfiat. face at an oblique angle to theaxis of shaft-I 6 is provided, which cooperates with a matching cammember 36 secured to the shaft l trirrany convenient manner. Cam member36 is keyedtoithe: sleeve 32: by meansof key 33 but is adapted: to movelongitudinally with respect thereto. Tosminimize the friction betweenfaces of 0am members: 34- and 36/ a plurality of balls maybeprovidedwhich. may be retained in any conventionalball retainersecured to either cam member 34 or 36.

Meansareprovided. to limit the outward movement of shoes 2'2 foreffecting speed control of the. driven shaft Iii and for increasing thepres sure between. shoes 22- and drum 26 when the torque applied to thedriven shaft is increased. A helical spring 4-2 is-.held betweencam'member 3dand a: cone member. M secured to sleeve 32 by key 33 but.free to-move longitudinally'thereom The conical face-of: cone member Mis in contact with the left endrof levers 26; tending to rotate them:inia direction by the bias of spring 32 to hold: shoes 22 inengagement-1 with drum 253.

For preventing the sleeve 32: from moving totherightvathrust.bearing:46:mounted on the end of: diiiveni shaft I6 isprovided; which abuts the right. end of the: sleeve 32' and" the leftface of drum. 29;

The mechanism thus described operates as follows:.

Rotation. of the'driving shaft l2 efiects rotation of the driven shaftI61 through the medium of torque andispeed responsive mechanism It. Theshoes 22: are constantly urged into contact with the drum. 7.0 by thebias of spring 42 against the levers lfi. I-l-owevenas the' speed ofthedriving shaft. I 2 increases beyond a predetermined amounts. thelevers? 26 with: their: attendant shoes tend to rotate: in a. directionsinrulta-neou'sly to urge cone member 44 to the left against the bias ofspring 42 and to lessen the pressure of shoes 22 against the drum 20.

When the torque delivered by the generator as measured by the outputcurrent exceeds some predetermined value, the bias of spring-i2 will notbe sufficient to prevent cam member 34 from rotating relatively to cammember 36. When such relative rotation takes place, the cams willseparate and one of the balls 48 retained between the faces of members34 and 36 Will take the thrust. Simultaneously, the bias of spring 42increases to urge cone member 44 to the right to increase the pressureof shoes 22 against drum 20.

Thus has been described an extremely simple and efficient mechanismwhich is both torque and speed responsive. While the invention has beendescribed in terms of a preferred embodiment thereof, it is not limitedexcept by the spirit and scope of the claims hereto appended.

We claim:

1. A torque and speed responsive mechanism comprising a driving shaft, adriven shaft, a drum supported by said driving shaft, a cam membersecured to the driven shaft and having a cam face at an oblique angle tothe axis of said shaft, a sleeve supported by said driven shaft, asecond cam member secured to said sleeve and having an oblique facecooperating with the first said cam face, a yoke extending radially fromsaid sleeve, levers pivotally supported by said yoke, shoes mounted atthe ends of said levers for engagement with said drum, a conical shapedcam member secured to said sleeve in engagement with the other ends ofsaid levers, and means intermediate the second named cam member and theconical shaped cam member for urging said shoes into firmer contact withsaid drum.

2. A torque and speed responsive mechanism comprising a driving shaft, adriven shaft, a drum supported by said driving shaft, a cam membersecured to the driven shaft and having a cam face at an oblique angle tothe axis of said shaft, a sleeve supported by said driven shaft, asecond cam member secured to said sleeve and having an oblique facecooperating with the first said cam face, a yoke extending radially fromsaid sleeve, a lever pivotally supported by said yoke,

a shoe mounted at one end of said lever for enr gagement with saiddrLun, a conical shaped cam member secured to said sleeve in engagementwith the other end of said lever, and means intermediate the secondnamed cam member and the conical shaped cam member for urging said shoeinto firmer contact with said drum, said lever being adapted to movewith said shoe to decrease the pressure against said drum when the speedof said driven shaft increases beyond a predetermined amount.

3. A torque and speed responsive mechanism comprising a driving shaft, adriven shaft, a drum supported by said driving shaft, a cam membersecured to the driven shaft and having a cam face at an oblique angle tothe axis of said shaft, a sleeve supported by said driven shaft, a'second cam member secured to said sleeve and having an oblique facecooperating with the first cam face, a yoke extending radially from saidsleeve, a lever pivotally supported by said yoke, a shoe mounted at oneend of said lever for engagement with said drum, a conical shaped cammember secured to said sleeve in engagement with the other end of saidlever, spring means intermediate the second named cam member and theconical shaped cam member for increasing the pressure between said shoeand Said drum when relative rotation takes place between the first namedcam member and the second named cam member.

4. A torque and speed responsive mechanism comprising 9, driving shaft,a driven shaft, a drum supported by said driving shaft, a cam membersecured to the driven shaft and having a cam face at an oblique angle tothe axis of said shaft, a sleeve supported by said driven shaft, asecond cam member secured to said sleeve and having an oblique facecooperating with the first said cam face, a yoke extending radially fromsaid sleeve, a lever pivotally supported by said yoke, a shoe mounted atone end of said lever for engagement with said drum, the speed ofrotation of said driven shaft in excess of a predetermined amount beingadapted to reduce the pressure of said shoe against said drum, a conicalshaped cam member secured to said sleeve in engagement with the otherend of said lever, a spring intermediate the second named cam member andthe conical shaped cam member for increasing the pressure between saidshoe and said drum when relative rotation takes place between the firstnamed cam member and the second named cam member. I

5. A torque and speed responsive mechanism comprising a driving shaft, adriven shaft, a drum supported by said driving shaft, a cam membersecured to the driven shaft and having a cam face at an oblique angle tothe axis of said shaft, a second cam member secured to said sleeve andhaving an oblique face cooperating with the first said cam face, a yokeextending radially from said sleeve, a lever pivotally supported by saidarm, a shoe mounted at one end of said lever for engagement with saiddrum, the speed of rotation of said driven shaft in excess of apredetermined amount being adapted to reduce the pressure of said shoeagainst said drum, a conical shaped cam member secured to said sleeve inengagement with the other end of said lever, a spring intermediate thesecond named cam member and the conical shaped cam member for increasingthe pressure between said shoe and said drum when relative rotationtakes place between the first named cam member and the second named cammember upon increase of torque applied to the said driven shaft.

6. A torque and speed responsive mechanism comprising a driving member,a driven member, means responsive to the speed of the driven member forvarying the force transmitted by the driving member to the drivenmember, a cam supported by said driven member, a second cam cooperatingwith said first cam, a third cam in cooperation with said speedresponsive means, and means spacing said second and third cams forvarying the force transmitted from the driving member to the drivenmember.

7. A torque and speed responsive mechanism comprising a driving member,a driven member, means responsive to the speed of the driven member forvarying the force transmitted by the driving member to the drivenmember, a cam supported by said driven member, a second cam cooperatingwith the first cam, a third cam in cooperation with said speedresponsive means, and resilient means spacing said second and third camsfor varying the force transmitted from the driving member to the drivenmember.

8. A torque and speed responsive mechanism comprising a driving member,a driven member,

speed responsive means supported by the driven member for varying theforce transmitted by the driving member to the driven member, a cammember supported by said driven member, a second cam member cooperatingtherewith, a third cam member in contact with said speed responsivemeans, and means spacing said second and third cam members for varyingthe force transmitted from the driving member to the driven memberaccording to the torque demand upon said driven member.

9. A torque and speed responsive mechanism comprising a driving shaft,a, driven shaft, speed responsive means supported by the driven shaftfor varying the force transmitted by the driving shaft to the drivenshaft, a cam member supported by said driven shaft, a second cam membercooperating therewith, a third cam member in contact with said speedresponsive means, and

resilient means spacing said second and third cam members for varyingthe force transmitted from the driving shaft to the driven shaftaccording to the torque demand upon said driven shaft.

JOSEPH NADER.

JOSEPH F. MAILANDER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 462,028 Ballard Oct. 27, 18911,720,962 MacBlane July 16, 1929 1,741,251 Schneider Dec. 31, 19291,841,284 Gillett Jan. 12, 1932

